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/* This program is a menu-driven program that will loop allowing the user to select food items from the menu adding each item to the bill,
terminating when the user selects the “End order” item. The program will
then calculate and display the total bill with tax (.065) and tip (.20);
tip is calculated on the pretax bill. The program also needs to collect payment and calculate change due. */
#include <iostream>
#include <string>
#include <iomanip>
using namespace std;
//Function prototypes
void showMenu();
void showBill(double, double, double, double);
void showChange(double, double);
double bill = 0.0;
int main()
{
int choice;
//constants for the menu choices
const int HAMBURGER_CHOICE = 1,
HOTDOG_CHOICE = 2,
PEANUTS_CHOICE = 3,
POPCORN_CHOICE = 4,
SODA_CHOICE = 5,
CHIPS_CHOICE = 6,
WATER_CHOICE = 7,
QUIT_CHOICE = 8;
//constants for prices
const double HAMBURGER = 6.0,
HOTDOG = 4.5,
PEANUTS = 3.75,
POPCORN = 5.5,
SODA = 2.8,
CHIPS = 1.0,
WATER = 1.0;
// set up numeric out put formatting
cout << fixed << showpoint << setprecision(2);
showMenu();
do
{
//Display the menu and get the user's choice.
cout << "Enter menu item: ";
cin >> choice;
//Validate the menu selection.
while (choice < HAMBURGER_CHOICE || choice > QUIT_CHOICE)
{
cout << "Please enter a valid menu chioce: ";
cin >> choice;
}
//if the user does not want to quit, proceed.
if (choice == 1)
{
bill += 6.0;
}
else if (choice == 2)
{
bill += 4.5;
}
else if (choice == 3)
{
bill += 3.75;
}
else if (choice == 4)
{
bill += 5.50;
}
else if (choice == 5)
{
bill +=2.8;
}
else if (choice == 6)
{
bill += 1.0;
}
else if (choice == 7)
{
bill += 2.0;
}
}
while (choice != QUIT_CHOICE);
double amtTendered = 0;
double totBill = 0;
double const tax = bill * .065;
double tip = bill * .20;
showBill(bill, totBill, tax, tip);
totBill = bill + tax + tip;
showChange (totBill, amtTendered);
system ("pause");
return 0;
}
//***********************************************************
// Definition of function showMenu which displays the menu. *
//***********************************************************
void showMenu()
{
cout << "\n\tBaseball Game Snack Menu\n"
<< "1. Hamburger $6.00\n"
<< "2. Hotdog $4.50\n"
<< "3. Peanuts $3.75n"
<< "4. Popcorn $5.50\n"
<< "5. Soda $2.80\n"
<< "6. Chips $1.00\n"
<< "7. Water $2.00\n"
<< "8. End order\n";
}
//***********************************************************
// Definition of function showBill which displays the bill. *
//***********************************************************
void showBill(double bill, double totBill, double tax, double tip)
{
cout << "Bill = $"
<< bill
<< "\nTax = "
<< tax
<< "\nTip = "
<< tip
<< "\n";
}
//*************************************************************************
// Definition of function showChange which displays the total and change. *
//*************************************************************************
void showChange(double totBill, double amtTendered)
{
cout << "Total amount due: $"
<< totBill
<< "\n";
cout << "Enter amount tendtered: ";
cin >> amtTendered;
if (amtTendered < totBill) {
cout << "Amount paid is not enough to cover bill, please enter new amount: ";
cin >> amtTendered;
}
cout << "Change due = $"
<< (amtTendered - totBill)
<< "\n";
}
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